Like the rest of us, politicians can honestly change their mind about an issue.

But when a presidential candidate “firmly” pledges to, say, never act to raise taxes of any kind on families earning less than $250,000 a year, and then reneges, that doesn’t quite count. And then when, soon after being elected, the politician pretends that his earlier pledge doesn’t mean what it plainly meant — or even pretends that he never made the pledge at all — one suspects that the original promise was really a fib, a falsehood. From the get-go.

In an interview with George Stephanopoulos given last September during the health care debate, Barack Obama tried to escape his no-new-taxes pledge by asserting that the new taxes that would be imposed on Americans declining to buy health insurance under his health care plan would not in fact be taxes. With a straight face, Obama even disputed the dictionary definition of “tax” that Stephanopoulos recited to him.

Now we’re hearing from an administration official that the president never even made the pledge. According to White House Budget Director Peter Orszag, it was merely an expression of a “preference.” We’ll have to wait until a bipartisan commission (on how to tax us more) finishes its work before we learn whether it will be viable for Obama to hew to that “preference.”

Meanwhile, those who prefer truth can view the video proof of an actual pledge on YouTube.

This is Common Sense. I’m Paul Jacob.

As a candidate, Barack Obama promised that he would not raise taxes on any but the wealthiest Americans. Make less than $250,000 a year? You’re home free under his administration.

I mean, not counting current federal levies.

But President Obama has all the ambitions of a big-spending liberal. And “big-spending” translates pretty quickly into “big-taxing.”

One of these projects is a massive new federal takeover of the health care industry, in the name of “universal coverage.” New taxes would be imposed. For example, anyone who refuses to sign up for health insurance in the new regime would be slammed with a hefty tax.

Obama denies that such taxes would in fact be taxes. He even rebuked George Stephanopoulos for citing a dictionary definition of the word. Leaping to the president’s defense, House Majority Leader Steny Hoyer agreed that the new taxes would not be taxes. “[W]hat we are saying,” Hoyer said, “is everybody will contribute . . . to making sure that health care options are available to all of our citizens.”

Try dispute that. It’s like arguing with fog. Columnist Jacob Sullum quotes Hoyer and observes, “So we’re talking about a legally required contribution that will be used to provide a government-arranged benefit. If only there were a shorter way of expressing that concept.”

Well, in searching for le mot juste, don’t tax yourself.

This is Common Sense. I’m Paul Jacob.

Remember the Alliance for Bonded Term Limits?

I talked about the group last summer, when ABTL was little more than an idea. They were looking for candidates who would not only vow to limit their terms in office, but also agree to forfeit a big chunk of their assets if they break their word.

Sounds like a good idea — some vote-getters are quite skilled at sounding honest and sincere and rock-solid about principles they couldn’t care less about. Let them put their money where their mouths are if they’re truly serious about limiting their tenure in office.

And now someone has done just that: Will Breazeale, a North Carolina Republican. He’s seeking votes in next year’s election, hoping to represent the state’s seventh congressional district. In October, Mr. Breazeale formally executed a bond for $250,000 in a ceremony before the Board of Elections Office in New Hanover. If he tries to serve more than three consecutive terms, the money goes to charity.

At his website, Breazeale tells voters, “When I say that I will only serve three terms as your Congressman, I mean it; and I hope this promissory note will make my intentions clear.”

Breazeale is the first candidate in the country to commit himself to limiting his own terms in office with a bonded pledge. Let us hope he’s the first of many.

This is Common Sense. I’m Paul Jacob.